Motorola — faulty battery

Address:

Mumbai City, Maharashtra

I purchased Moto G 8 months ago from flipcart. Now the battery has swollen up and is physically damaged. The phone doesn't get charged properly and even after fully charging, it drains off within 1 hour from charging. I tried contacting customer care services through all modes of communication but no one seems to care. I have been told that the physical damage is not covered under warranty and I will have to bear the expenses of changing damaged battery and housing myself. Why should I pay if the company uses faulty/ cheap/ fake parts in their products? Please help